My XC90 , while the car did oil change service (51,000 miles).The Service adviser toll me all 4 wheel brake pads about 3mm left, recommend replace all 4, we replaced all. but he has another strong recommend to replace the front brake rotors at that time, because the rotors almost gone, I don't understand, why the brake pads still have 3mm, the rotors get damage. However SAFE always important, of course, I need to replaced, but that's never happen on other Volvo I had owned.
I hope someone can explain about this case. Thank you.